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identifiers.spec.ts
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import { LuaTarget } from "../../src";
import { invalidAmbientIdentifierName } from "../../src/transformation/utils/diagnostics";
import { luaKeywords } from "../../src/transformation/utils/safe-names";
import * as util from "../util";
const invalidLuaCharNames = ["$$$", "ɥɣɎɌͼƛಠ", "_̀ः٠‿"];
const validTsInvalidLuaKeywordNames = [
"and",
"elseif",
"end",
"goto",
"local",
"nil",
"not",
"or",
"repeat",
"then",
"until",
];
const invalidLuaNames = [...invalidLuaCharNames, ...luaKeywords];
const validTsInvalidLuaNames = [...invalidLuaCharNames, ...validTsInvalidLuaKeywordNames];
test.each(validTsInvalidLuaNames)("invalid lua identifier name (%p)", name => {
util.testFunction`
const ${name} = "foobar";
return ${name};
`.expectToMatchJsResult();
});
test.each([...luaKeywords.values()])("lua keyword as property name (%p)", keyword => {
util.testFunction`
const x = { ${keyword}: "foobar" };
return x.${keyword};
`.expectToMatchJsResult();
});
test.each(validTsInvalidLuaKeywordNames)("destructuring lua keyword (%p)", keyword => {
util.testFunction`
const { foo: ${keyword} } = { foo: "foobar" };
return ${keyword};
`.expectToMatchJsResult();
});
test.each(validTsInvalidLuaKeywordNames)("destructuring shorthand lua keyword (%p)", keyword => {
util.testFunction`
const { ${keyword} } = { ${keyword}: "foobar" };
return ${keyword};
`.expectToMatchJsResult();
});
test.each(invalidLuaNames)("lua keyword or invalid identifier as method call (%p)", name => {
util.testFunction`
const foo = {
${name}(arg: string) { return "foo" + arg; }
};
return foo.${name}("bar");
`.expectToMatchJsResult();
});
test.each(invalidLuaNames)("lua keyword or invalid identifier as complex method call (%p)", name => {
util.testFunction`
const foo = {
${name}(arg: string) { return "foo" + arg; }
};
function getFoo() { return foo; }
return getFoo().${name}("bar");
`.expectToMatchJsResult();
});
test.each([
"var local: any;",
"let local: any;",
"const local: any;",
"const foo: any, bar: any, local: any;",
"class local {}",
"namespace local { export const bar: any; }",
"module local { export const bar: any; }",
"enum local {}",
"function local() {}",
])("ambient identifier cannot be a lua keyword (%p)", statement => {
util.testModule`
declare ${statement}
local;
`
.disableSemanticCheck()
.expectDiagnosticsToMatchSnapshot([invalidAmbientIdentifierName.code]);
});
test.each([
"var $$$: any;",
"let $$$: any;",
"const $$$: any;",
"const foo: any, bar: any, $$$: any;",
"class $$$ {}",
"namespace $$$ { export const bar: any; }",
"module $$$ { export const bar: any; }",
"enum $$$ {}",
"function $$$();",
])("ambient identifier must be a valid lua identifier (%p)", statement => {
util.testModule`
declare ${statement}
$$$;
`.expectDiagnosticsToMatchSnapshot([invalidAmbientIdentifierName.code]);
});
test.each(validTsInvalidLuaNames)(
"ambient identifier must be a valid lua identifier (object literal shorthand) (%p)",
name => {
util.testModule`
declare var ${name}: any;
const foo = { ${name} };
`.expectDiagnosticsToMatchSnapshot([invalidAmbientIdentifierName.code]);
}
);
test.each(validTsInvalidLuaNames)("undeclared identifier must be a valid lua identifier (%p)", name => {
util.testModule`
const foo = ${name};
`
.disableSemanticCheck()
.expectDiagnosticsToMatchSnapshot([invalidAmbientIdentifierName.code]);
});
test.each(validTsInvalidLuaNames)(
"undeclared identifier must be a valid lua identifier (object literal shorthand) (%p)",
name => {
util.testModule`
const foo = { ${name} };
`
.disableSemanticCheck()
.expectDiagnosticsToMatchSnapshot([invalidAmbientIdentifierName.code]);
}
);
test.each(validTsInvalidLuaNames)("exported values with invalid lua identifier names (%p)", name => {
const testBuilder = util.testModule(`export const ${name} = "foobar";`);
const lua = testBuilder.getMainLuaCodeChunk();
const luaResult = testBuilder.getLuaExecutionResult();
expect(lua.indexOf(`"${name}"`)).toBeGreaterThanOrEqual(0);
expect(luaResult[name]).toBe("foobar");
});
test("exported identifiers referenced in namespace (%p)", () => {
util.testModule`
export const foo = "foobar";
namespace NS {
export const bar = foo;
}
export const baz = NS.bar;
`.expectToMatchJsResult();
});
test("exported namespace identifiers referenced in different namespace (%p)", () => {
const tsHeader = `
namespace A {
export const foo = "foobar";
namespace B {
export const bar = foo;
}
export const baz = B.bar;
}`;
util.testFunction("return A.baz").setTsHeader(tsHeader).expectToMatchJsResult();
});
test("exported identifiers referenced in nested scope (%p)", () => {
util.testModule`
export const foo = "foobar";
namespace A {
export namespace B {
export const bar = foo;
}
}
export const baz = A.B.bar;
`.expectToMatchJsResult();
});
test.each(validTsInvalidLuaNames)(
"exported values with invalid lua identifier names referenced in different scope (%p)",
name => {
util.testModule`
export const ${name} = "foobar";
namespace NS {
export const foo = ${name};
}
export const bar = NS.foo;
`.expectToMatchJsResult();
}
);
test.each(validTsInvalidLuaNames)("class with invalid lua name has correct name property", name => {
util.testFunction`
class ${name} {}
return ${name}.name;
`.expectToMatchJsResult();
});
test.each(validTsInvalidLuaNames)("decorated class with invalid lua name", name => {
util.testFunction`
function decorator<T extends new (...args: any[]) => any>(Class: T, context: ClassDecoratorContext): T {
return class extends Class {
public bar = "foobar";
};
}
@decorator
class ${name} {}
return (${name} as any).bar;
`.expectToMatchJsResult();
});
test.each(validTsInvalidLuaNames)("exported decorated class with invalid lua name", name => {
util.testModule`
function decorator<T extends new (...args: any[]) => any>(Class: T, context: ClassDecoratorContext): T {
return class extends Class {
public bar = "foobar";
};
}
@decorator
export class ${name} {}
`
.setReturnExport(name, "bar")
.expectToMatchJsResult();
});
describe("unicode identifiers in supporting environments (luajit)", () => {
const unicodeNames = ["𝛼𝛽𝚫", "ɥɣɎɌͼƛಠ", "_̀ः٠‿"];
test.each(unicodeNames)("identifier name (%p)", name => {
util.testFunction`
const ${name} = "foobar";
return ${name};
`
.setOptions({ luaTarget: LuaTarget.LuaJIT })
.expectLuaToMatchSnapshot();
});
test.each(unicodeNames)("property name (%p)", name => {
util.testFunction`
const x = { ${name}: "foobar" };
return x.${name};
`
.setOptions({ luaTarget: LuaTarget.LuaJIT })
.expectLuaToMatchSnapshot();
});
test.each(unicodeNames)("destructuring property name (%p)", name => {
util.testFunction`
const { foo: ${name} } = { foo: "foobar" };
return ${name};
`
.setOptions({ luaTarget: LuaTarget.LuaJIT })
.expectLuaToMatchSnapshot();
});
test.each(unicodeNames)("destructuring shorthand (%p)", name => {
util.testFunction`
const { ${name} } = { ${name}: "foobar" };
return ${name};
`
.setOptions({ luaTarget: LuaTarget.LuaJIT })
.expectLuaToMatchSnapshot();
});
test.each(unicodeNames)("function (%p)", name => {
util.testFunction`
function ${name}(arg: string) {
return "foo" + arg;
}
return ${name}("bar");
`
.setOptions({ luaTarget: LuaTarget.LuaJIT })
.expectLuaToMatchSnapshot();
});
test.each(unicodeNames)("method (%p)", name => {
util.testFunction`
const foo = {
${name}(arg: string) { return "foo" + arg; }
};
return foo.${name}("bar");
`
.setOptions({ luaTarget: LuaTarget.LuaJIT })
.expectLuaToMatchSnapshot();
});
});
test("unicode export class", () => {
util.testModule`
import { 你好 } from "./utfclass";
export const result = new 你好().hello();
`
.addExtraFile(
"utfclass.ts",
`export class 你好 {
hello() {
return "你好";
}
}`
)
.expectToEqual({ result: "你好" });
});
test("unicode export default class", () => {
util.testModule`
import c from "./utfclass";
export const result = new c().hello();
`
.addExtraFile(
"utfclass.ts",
`export default class 你好 {
hello() {
return "你好";
}
}`
)
.expectToEqual({ result: "你好" });
});
// https://github.com/TypeScriptToLua/TypeScriptToLua/issues/1645
test("unicode static initialization block (#1645)", () => {
util.testModule`
export default class 自定义异能 {
static {
let a = 1;
}
}
`.expectLuaToMatchSnapshot();
});
describe("lua keyword as identifier doesn't interfere with lua's value", () => {
test("variable (nil)", () => {
util.testFunction`
const nil = "foobar";
return \`\${undefined}|\${nil}\`
`.expectToEqual("nil|foobar");
});
test("variable (and)", () => {
util.testFunction`
const and = "foobar";
return true && and;
`.expectToMatchJsResult();
});
test("variable (elseif)", () => {
util.testFunction`
const elseif: string | undefined = "foobar";
if (false) {
} else if (elseif) {
return elseif;
}
`.expectToMatchJsResult();
});
test("variable (end)", () => {
util.testFunction`
const end = "foobar";
{
return end;
}
`.expectToMatchJsResult();
});
test("variable (local)", () => {
util.testFunction`
const local = "foobar";
return local;
`.expectToMatchJsResult();
});
test("variable (not)", () => {
util.testFunction`
const not = "foobar";
return (!false) && not;
`.expectToMatchJsResult();
});
test("variable (or)", () => {
util.testFunction`
const or = "foobar";
return false || or;
`.expectToMatchJsResult();
});
test("variable (repeat)", () => {
util.testFunction`
const repeat = "foobar";
do {} while (false);
return repeat;
`.expectToMatchJsResult();
});
test("variable (then)", () => {
util.testFunction`
const then: string | undefined = "foobar";
if (then) {
return then;
}
`.expectToMatchJsResult();
});
test("variable (until)", () => {
util.testFunction`
const until = "foobar";
do {} while (false);
return until;
`.expectToMatchJsResult();
});
test("variable (goto)", () => {
util.testFunction`
const goto = "foobar";
switch (goto) {
case goto:
return goto;
}
`.expectToMatchJsResult();
});
test("variable (print)", () => {
const luaHeader = `
local result = ""
print = function(s)
result = result .. s
end`;
const tsHeader = `
declare let result: string;`;
const compilerOptions = { lib: ["lib.es2015.d.ts", "lib.dom.d.ts"] };
util.testFunction`
const print = "foobar";
console.log(print);
return result;
`
.setLuaHeader(luaHeader)
.setTsHeader(tsHeader)
.setOptions(compilerOptions)
.expectToEqual("foobar");
});
test("variable (type)", () => {
util.testFunction`
function type(this: void, a: unknown) {
return (typeof a) + "|foobar";
}
return type(7);
`.expectToMatchJsResult();
});
test("variable (error)", () => {
const executionResult = util.testFunction`
const error = "foobar";
throw error;
`.getLuaExecutionResult();
expect(executionResult).toEqual(new util.ExecutionError("foobar"));
});
test("variable (assert)", () => {
const compilerOptions = { lib: ["lib.es2015.d.ts", "lib.dom.d.ts"] };
const luaResult = util.testFunction`
const assert = false;
console.assert(assert, "foobar");
`
.setOptions(compilerOptions)
.getLuaExecutionResult();
expect(luaResult).toEqual(new util.ExecutionError("foobar"));
});
test("variable (debug)", () => {
const luaHeader = `
local result = ""
print = function(s)
result = result .. s
end`;
const tsHeader = `
declare let result: string;`;
const compilerOptions = { lib: ["lib.es2015.d.ts", "lib.dom.d.ts"] };
const luaResult = util.testFunction`
const debug = "foobar";
console.trace(debug);
return result;
`
.setTsHeader(tsHeader)
.setLuaHeader(luaHeader)
.setOptions(compilerOptions)
.getLuaExecutionResult();
expect(luaResult).toMatch(/^foobar\nstack traceback.+/);
});
test("variable (string)", () => {
util.testFunction`
const string = "foobar";
return string[0];
`.expectToMatchJsResult();
});
test("variable (math)", () => {
util.testFunction`
const math = -17;
return Math.abs(math);
`.expectToMatchJsResult();
});
test("variable (table)", () => {
util.testFunction`
const table = ["foobar"];
return table.pop();
`.expectToMatchJsResult();
});
test("variable (coroutine)", () => {
util.testFunction`
const coroutine = "foobar";
function *foo() { yield coroutine; }
return foo().next().value;
`.expectToMatchJsResult();
});
test("variable (pairs)", () => {
util.testFunction`
const pairs = {foobar: "foobar"};
let result = "";
for (const key in pairs) {
result += key;
}
return result;
`.expectToMatchJsResult();
});
test("variable (pcall)", () => {
util.testFunction`
const pcall = "foobar";
try {} finally {}
return pcall;
`.expectToMatchJsResult();
});
test("variable (rawget)", () => {
util.testFunction`
const rawget = {foobar: "foobar"};
return rawget.hasOwnProperty("foobar");
`.expectToMatchJsResult();
});
test("variable (require)", () => {
const luaHeader = 'package.loaded.someModule = {foo = "bar"}';
const luaResult = util.testModule`
const require = "foobar";
export { foo } from "someModule";
export const result = require;
`
.setLuaHeader(luaHeader)
.getLuaExecutionResult();
expect(luaResult.result).toBe("foobar");
});
test("variable (tostring)", () => {
util.testFunction`
const tostring = 17;
return tostring.toString();
`.expectToMatchJsResult();
});
test("variable (unpack)", () => {
// Can't use expectToMatchJsResult because above is not valid TS/JS
const luaHeader = "unpack = table.unpack";
const luaResult = util.testFunction`
const unpack = ["foo", "bar"];
const [foo, bar] = unpack;
return foo + bar;
`
.setLuaHeader(luaHeader)
.getLuaExecutionResult();
expect(luaResult).toBe("foobar");
});
test("variable (bit32)", () => {
util.testFunction`
const bit32 = 1;
return bit32 << 1;
`
.setOptions({ luaTarget: LuaTarget.Lua52 })
.expectToMatchJsResult();
});
test("variable (_G)", () => {
util.testFunction`
const _G = "bar";
(globalThis as any).foo = "foo";
return (globalThis as any).foo + _G;
`.expectToMatchJsResult();
});
test("function parameter", () => {
util.testFunction`
function foo(type: unknown) {
return \`\${typeof type}|\${type}\`;
}
return foo("foobar");
`.expectToMatchJsResult();
});
test("destructured property function parameter", () => {
util.testFunction`
function foo({type}: any) {
return \`\${typeof type}|\${type}\`;
}
return foo({type: "foobar"});
`.expectToMatchJsResult();
});
test("destructured array element function parameter", () => {
util.testFunction`
function foo([type]: any) {
return \`\${typeof type}|\${type}\`;
}
return foo(["foobar"]);
`.expectToMatchJsResult();
});
test("property", () => {
util.testFunction`
const type = "foobar";
const foo = { type: type };
return type + "|" + foo.type + "|" + typeof type;
`.expectToMatchJsResult();
});
test("shorthand property", () => {
util.testFunction`
const type = "foobar";
const foo = { type };
return type + "|" + foo.type + "|" + typeof type;
`.expectToMatchJsResult();
});
test("destructured property", () => {
util.testFunction`
const foo = { type: "foobar" };
const { type: type } = foo;
return type + "|" + foo.type + "|" + typeof type;
`.expectToMatchJsResult();
});
test("destructured shorthand property", () => {
util.testFunction`
const foo = { type: "foobar" };
const { type } = foo;
return type + "|" + foo.type + "|" + typeof type;
`.expectToMatchJsResult();
});
test("destructured array element", () => {
util.testFunction`
const foo = ["foobar"];
const [type] = foo;
return type + "|" + typeof type;
`.expectToMatchJsResult();
});
test.each(["type", "type as type"])("imported variable (%p)", importName => {
// Can't use expectToMatchJsResult because above is not valid TS/JS
const luaHeader = 'package.loaded.someModule = {type = "foobar"}';
const luaResult = util.testModule`
import {${importName}} from "someModule";
export const result = typeof 7 + "|" + type;
`
.setLuaHeader(luaHeader)
.getLuaExecutionResult();
expect(luaResult.result).toBe("number|foobar");
});
test("separately exported variable (%p)", () => {
util.testModule`
const type = "foobar";
export { type }
export { type as mytype }
export const result = typeof type + "|" + type;
`.expectToMatchJsResult();
});
test.each(["type", "type as type"])("re-exported variable with lua keyword as name (%p)", importName => {
// Can't use expectToMatchJsResult because above is not valid TS/JS
const luaHeader = 'package.loaded.someModule = {type = "foobar"}';
const luaResult = util.testModule`
export { ${importName} } from "someModule";
`
.setLuaHeader(luaHeader)
.getLuaExecutionResult();
expect(luaResult.type).toBe("foobar");
});
test("class", () => {
util.testFunction`
class type {
method() { return typeof 0; }
static staticMethod() { return typeof "foo"; }
}
const t = new type();
return t.method() + "|" + type.staticMethod();
`.expectToMatchJsResult();
});
test("subclass of class", () => {
util.testFunction`
class type {
method() { return typeof 0; }
static staticMethod() { return typeof "foo"; }
}
class Foo extends type {}
const foo = new Foo();
return foo.method() + "|" + Foo.staticMethod();
`.expectToMatchJsResult();
});
test.each(["result", "type ~= nil"])("exported class (%p)", returnExport => {
util.testModule`
export class type {
method() { return typeof 0; }
static staticMethod() { return typeof "foo"; }
}
const t = new type();
export const result = t.method() + "|" + type.staticMethod();
`
.setReturnExport(returnExport)
.expectToMatchJsResult();
});
test.each(["result", "type ~= nil"])("subclass of exported class (%p)", returnExport => {
util.testModule`
export class type {
method() { return typeof 0; }
static staticMethod() { return typeof "foo"; }
}
class Foo extends type {}
const foo = new Foo();
export const result = foo.method() + "|" + Foo.staticMethod();
`
.setReturnExport(returnExport)
.expectToMatchJsResult();
});
test("namespace", () => {
const tsHeader = `
namespace type {
export const foo = "foobar";
}`;
const code = `
return typeof type.foo + "|" + type.foo`;
util.testFunction(code).setTsHeader(tsHeader).expectToMatchJsResult();
});
test("exported namespace (%p)", () => {
util.testModule`
export namespace type {
export const foo = "foobar";
}
export const result = typeof type.foo + "|" + type.foo;
`.expectToMatchJsResult();
});
test("merged namespace", () => {
const tsHeader = `
class type {
method() { return typeof 0; }
static staticMethod() { return typeof true; }
}
namespace type {
export const foo = "foo";
}
namespace type {
export const bar = "bar";
}`;
const code = `
const t = new type();
return \`\${t.method()}|\${type.staticMethod()}|\${typeof type.foo}|\${type.foo}|\${type.bar}\`;`;
util.testFunction(code).setTsHeader(tsHeader).expectToMatchJsResult();
});
test.each(["result", "type ~= nil"])("exported merged namespace (%p)", returnExport => {
util.testModule`
export class type {
method() { return typeof 0; }
static staticMethod() { return typeof true; }
}
export namespace type {
export const foo = "foo";
}
export namespace type {
export const bar = "bar";
}
const t = new type();
export const result = \`\${t.method()}|\${type.staticMethod()}|\${typeof type.foo}|\${type.foo}|\${type.bar}\`;
`
.setReturnExport(returnExport)
.expectToMatchJsResult();
});
});
test("declaration-only variable with lua keyword as name is not renamed", () => {
util.testFunction("type(7)")
.setTsHeader("declare function type(this: void, a: unknown): string;")
.expectLuaToMatchSnapshot();
});
test("exported variable with lua keyword as name is not renamed", () => {
util.testModule`
export const print = "foobar";
`.expectToMatchJsResult();
});
// https://github.com/TypeScriptToLua/TypeScriptToLua/issues/846
test("lua built-in as class method", () => {
util.testModule`
class MyClass {
error() { return "Error!"; }
}
export const result = new MyClass().error();
`.expectToMatchJsResult();
});
// https://github.com/TypeScriptToLua/TypeScriptToLua/issues/833
test("lua built-in as object method", () => {
util.testModule`
const obj = { error: () => "Error!" };
export const result = obj.error();
`.expectToMatchJsResult();
});
// https://github.com/TypeScriptToLua/TypeScriptToLua/issues/789
test("lua built-in as in constructor assignment", () => {
util.testModule`
class A {
constructor(public error: string){}
}
export const result = new A("42").error;
`.expectToMatchJsResult();
});
test("customName rename function", () => {
const result = util.testModule`
/** @customName test2 **/
function test(this: void): number { return 3; }
export const result: number = test();
`
.expectToEqual({ result: 3 })
.getLuaResult();
expect(result.transpiledFiles).not.toHaveLength(0);
const mainFile = result.transpiledFiles.find(f => f.outPath === "main.lua");
expect(mainFile).toBeDefined();
// avoid ts error "not defined", even though toBeDefined is being checked above
if (!mainFile) return;
expect(mainFile.lua).toBeDefined();
expect(mainFile.lua).toContain("function test2()");
expect(mainFile.lua).not.toContain("test()");
});
test("customName rename variable", () => {
const result = util.testModule`
/** @customName result2 **/
export const result: number = 3;
`
.expectToEqual({ result2: 3 })
.getLuaResult();
const mainFile = result.transpiledFiles.find(f => f.outPath === "main.lua");
expect(mainFile).toBeDefined();
// avoid ts error "not defined", even though toBeDefined is being checked above
if (!mainFile) return;
expect(mainFile.lua).toBeDefined();
expect(mainFile.lua).toContain("result2 =");
expect(mainFile.lua).not.toContain("result =");
});
test("customName rename classes", () => {
const testModule = util.testModule`
/** @customName Class2 **/
class Class {
test: string;
constructor(test: string) {
this.test = test;
}
}
export const result = new Class("hello world");
`;
const executionResult = testModule.getLuaExecutionResult();
expect(executionResult.result).toBeDefined();
expect(executionResult.result).toMatchObject({ test: "hello world" });
const result = testModule.getLuaResult();
expect(result.transpiledFiles).not.toHaveLength(0);
const mainFile = result.transpiledFiles.find(f => f.outPath === "main.lua");
expect(mainFile).toBeDefined();
// avoid ts error "not defined", even though toBeDefined is being checked above
if (!mainFile) return;
expect(mainFile.lua).toBeDefined();
expect(mainFile.lua).toContain("local Class2 =");
expect(mainFile.lua).not.toContain("local Class =");
});
test("customName rename namespace", () => {
const testModule = util.testModule`
/** @customName Test2 **/
namespace Test {
/** @customName Func2 **/
export function Func(): string {
return "hi";
}
}
export const result = Test.Func();
`;
testModule.expectToEqual({ result: "hi" });
const result = testModule.getLuaResult();
expect(result.transpiledFiles).not.toHaveLength(0);
const mainFile = result.transpiledFiles.find(f => f.outPath === "main.lua");
expect(mainFile).toBeDefined();
// avoid ts error "not defined", even though toBeDefined is being checked above
if (!mainFile) return;
expect(mainFile.lua).toBeDefined();
expect(mainFile.lua).toContain("Test2 =");
expect(mainFile.lua).toContain("Test2.Func2");
expect(mainFile.lua).not.toContain("Test =");
expect(mainFile.lua).not.toContain("Func(");
});
test("customName rename declared function", () => {
const testModule = util.testModule`
/** @customName Test2 **/
declare function Test(this: void): void;
Test();
`;
const result = testModule.getLuaResult();
expect(result.transpiledFiles).not.toHaveLength(0);
const mainFile = result.transpiledFiles.find(f => f.outPath === "main.lua");
expect(mainFile).toBeDefined();
// avoid ts error "not defined", even though toBeDefined is being checked above
if (!mainFile) return;
expect(mainFile.lua).toBeDefined();
expect(mainFile.lua).toContain("Test2(");
expect(mainFile.lua).not.toContain("Test(");
});
test("customName rename import specifier", () => {
const testModule = util.testModule`
import { Test } from "./myimport";
import { Test as Aliased } from "./myimport";
Test();
Aliased();